Holcim said it booked net profit of IDR175.95bn last year against a loss of IDR334.08bn in 2005.
Thanks to a stronger rupiah, the company posted forex gain of 383.12 bln rupiah last year, reversing a loss of IDR247.19bn in 2005, as the firmer currency reduced payments on its dollar-denominated debt.
That helped the cement manufacturer post IDR234.98bn in net other income for the past year against IDR331.52bn in net charges the year before.
Holcim Indonesia said its full-year sales dropped to IDR2.99trn from IDR3.02trn while production costs rose to IDR2.36trn from IDR2.29trn in the previous year.
As a result, its operating profit plunged to 6.18 bln rupiah last year from IDR143.10bn in 2005.